The Washington Post:
At 8:15 a.m. on Aug. 6, 1945, the first bomb exploded over Hiroshima killing, by some estimates, 140,000 people, and destroying 90 percent of the city. But near its hypocenter only one building was left standing.
Seventy years later, the Genbaku Dome — now known as the Hiroshima Peace Memorial — is part of a very different city that’s home to 1.2 million residents and filled with skyscrapers, apartment buildings and streetcars.
Armed with archival photographs, Reuters photographer Issei Kato revisited some of the same locations destroyed 70 years ago in both Hiroshima and Nagasaki.
The juxtapostion is truly heartening.
For further insight, the Washington Post has also provided various maps that will show you how it would look like it "Little Boy" hit your city inlcuding full detailed explanations of damaged areas. To sample what a possible nuclear bomb would be like in your city, check out Nuke Map.